Home / 12,660.72-18,989.42-3,895.44

Finding the Fourth Proportional to 12,660.72, 18,989.42 and 3,895.44

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Solution

The fourth proportional to 12,660.72, 18,989.42 and 3,895.44 is: 5,842.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.72 : 18,989.42 = 3,895.44 : x
  2. Step 2: Convert to fraction form
    12,660.72/18,989.42 = 3,895.44/x
  3. Step 3: Cross multiply
    12,660.72x = 18,989.42 × 3,895.44
  4. Step 4: Simplify right side
    12,660.72x = 73,972,146.24
  5. Step 5: Solve for x
    x = 73,972,146.24/12,660.72
  6. Step 6: Final answer
    x = 5,842.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.